Annie Leonhart has been training hard for one purpose, one mission: During the 57th Expedition Outside the Walls, she must seize Eren Yeager. The expedition commences tomorrow, but for now she has the day off...or so she thinks. Before Annie can make her own plans, her roommate Hitch sends her on a search for a missing girl. But the case is far more sinister than Annie could ever imagine, and before long, she is perilously caught in the chaos.

Before she was a combat prodigy, Mikasa was just another child raised in a cruel world. When she meets Eren Yeager for the first time, he spins elaborate tales of the outside world for her. This new friendship carries her through the deepest pain and opens her eyes to dangerous powers that lie within others...as a soldier who has overcome incredible trials, Mikasa's determination leads her to another formidable fighter: Annie Leonhart. What will they discover when their paths cross?